Display adjustment method and electronic device thereof

ABSTRACT

The invention provides a display adjustment method and an electronic device. The display adjustment method includes obtaining environmental information during capturing an image and display characteristic information of a display device, determining a display adjusting parameter according to the environmental information during capturing the image and the display characteristic information of the display, and controlling the display device for displaying the image according to the display adjusting parameter.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a display adjustment method and anelectronic device, and more particularly, to a display adjustment methodand an electronic device capable of adjusting a display device accordingto the environmental information during capturing the image and thedisplay characteristic information of the display device.

2. Description of the Prior Art

With the development of the technology and the improvement of industry,the functions of the digital camera have been widely applied in variousportable electronic products, such as mobile phone, tablet computer,wearable device and notebook and so on. Moreover, the user usuallyutilizes the community websites or the cloud software to share the imagecaptured by the digital camera equipped in the portable devices.However, since each display device of the electronic products may haverespective display characteristics (such as display brightness and colorand so on). When the same picture is displayed in different displaydevices, the display results on different display devices may bedifferent, thus resulting in picture distortion. For example, pleaserefer to FIG. 1, the electronic devices 10_1˜10_3 are a mobile phone, atablet computer and a notebook respectively. The picture image can bedisplayed by the display devices assembled in the electronic devices10_1˜10_3. As shown in FIG. 1, each display device of the electronicdevices represents different display brightness, display color anddisplay tone when displaying the same picture image. In other words, thedisplay results displayed the same picture image indifferent devices aredifferent. Therefore, the prior art should be improved necessarily.

SUMMARY OF THE INVENTION

To achieve the above objective, the present invention provides a displayadjustment method and an electronic device to adjust a display deviceaccording to environmental information during capturing an image anddisplay characteristic information of the display device, and to achievethe display effect which the picture displayed in different displaydevices are consistent.

The present invention discloses a display adjustment method for adisplay device comprising: obtaining environmental information duringcapturing an image and display characteristic information of the displaydevice; determining a display adjusting parameter according to theenvironmental information during capturing the image and the displaycharacteristic information of the display device; and controlling thedisplay device for displaying the image according to the displayadjusting parameter.

The present invention further discloses an electronic device withdisplay adjustment comprising: a display device; an informationextraction unit for acquiring environmental information during capturingan image and display characteristic information of the display device; aprocessing unit for determining a display adjusting parameter accordingto the environmental information during capturing the image and thedisplay characteristic information of the display device; and anadjustment unit for controlling the display device for displaying theimage according to the display adjusting parameter.

These and other objectives of the present invention will no doubt becomeobvious to those of ordinary skill in the art after reading thefollowing detailed description of the preferred embodiment that isillustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram illustrating utilizing different displaydevices for displaying image according to the prior art.

FIG. 2 is a schematic diagram of an electronic device according to anembodiment of the present invention.

FIG. 3 is a schematic diagram of a procedure according to an embodimentof the present invention.

FIG. 4 is a schematic diagram illustrating utilizing different displaydevices for displaying image according to an embodiment of the presentinvention.

DETAILED DESCRIPTION

Please refer to FIG. 2, which is a schematic diagram of an electronicdevice 20 according to an embodiment of the present invention. Theelectronic device 20 includes an information extraction unit 202, aprocessing unit 204, an adjustment unit 206 and a display device 208.The information extraction unit 202 is utilized for acquiringenvironmental information during capturing an image and displaycharacteristic information of the display device 208. The processingunit 204 is utilized for determining a display adjusting parameteraccording to the environmental information during capturing the imageand the display characteristic information of the display device 208.The adjustment unit 206 is utilized for controlling the display device208 for displaying the image according to the display adjustingparameter. Briefly, the electronic device 20 of the present inventioncan adjust the display adjusting parameter of the display deviceaccording to the environmental information during capturing the imageand the display characteristic information of the display device 208,and thus achieving the consistent display effect while showing the samepicture on different display devices.

Regarding a display adjustment method of the electronic device 20, thedisplay adjustment method may be summarized in an exemplary procedure30. Please refer to FIG. 3, which is a schematic diagram of theprocedure 30 according to an embodiment of the present invention. Theprocedure 30 includes the following steps:

Step 300: Start.

Step 302: Obtain environmental information during capturing image anddisplay characteristic information of display device.

Step 304: Determine display adjusting parameter according toenvironmental information during capturing image and displaycharacteristic information of display device.

Step 306: Control display device for displaying image according todisplay adjusting parameter.

Step 308: End.

According to the procedure 30, in Step 302, when the user wants toutilize the display device 208 of the electronic device 20 to display animage IMG, the electronic device 20 can receive a corresponding imagefile. The information extraction unit 202 can obtain the environmentalinformation during capturing the image and the display characteristicinformation of the display device 208. The environmental informationduring capturing the image includes environmental color temperatureinformation during capturing, environmental brightness informationduring capturing, and any other related environmental light source(light ray) information and/or scene information during capturing. Thedisplay characteristic information of the display device 208 includescolor temperature information of the display device 208, color spaceinformation of the display device 208 and panel characteristicinformation associated with the display device 208.

On the other hand, when the image extraction device (such as the digitalcamera of the mobile phone) captures the image, the currentenvironmental light source information, the current scene informationand relevant information during capturing can be recorded and used asthe environmental information during capturing the image for thefollowing display adjustment. In addition, the environmental informationduring capturing the image can be stored in a header file of the image.For example, the captured image can be stored in Joint PhotographicExperts Group (JPEG) file format, and the environmental informationduring capturing the image can be stored in the header segment of thecorresponding JPEG image file with exchangeable image file format(Exif). Therefore, after receiving the image file, the informationextraction unit 202 can extract the environmental information duringcapturing the image from the corresponding header segment of the imagefile. Moreover, the environmental information during capturing the imagemay be stored in a file which is different from the image file. As such,when the electronic device 20 displays the image file, the informationextraction unit 202 will obtain the environmental information duringcapturing the image from the corresponding file.

In Step 304, the processing unit 204 determines a display adjustingparameter according to the environmental information during capturingthe image and the display characteristic information of the displaydevice 208. For example, the processing unit 204 determines a color tonemapping matrix according to the environmental information duringcapturing the image and the display characteristic information of thedisplay device 208, and the adjustment unit 206 generates an adjusteddisplay color value parameter corresponding the image IMG accordingly tothe color tone mapping matrix. For example, if the environmental colortemperature information during capturing a first picture image is M1,the environmental brightness information during capturing the firstpicture image is N1 and the screen color information of the displaydevice 208 is Y1, the processing unit 204 can calculate a color tonemapping matrix A corresponding the first picture image accordingly. Ifthe environmental color temperature information during capturing asecond picture image is M2, the environmental brightness informationduring capturing the second picture image is N2 and the screen colorinformation of the display device 208 is Y1, the processing unit 204 cancalculate a color tone mapping matrix B corresponding the second pictureimage accordingly, and so on. In addition, the processing unit 204 maybe implemented by a central processing unit of the electronic device 20or other devices having the calculation function, but not limitedthereto.

In Step 306, the adjustment unit 206 can control the display device 208for displaying the image IMG according to the display adjustingparameter. For example, the adjustment unit 206 may be implemented by agraphics processing unit (GPU) of the electronic device 20 or otherdevices having the calculation function, but not limited thereto. Inmore detail, the adjustment unit 206 adjusts a display color valueparameter of the display device 208 according to the display adjustingparameter, so as to generate an adjusted display color value parameter.The adjustment unit 206 drives the display device 208 for displaying theimage IMG according to the adjusted display color value parameter. Forexample, assuming the display device 208 displays an image dataaccording to a display color value parameter [R,G,B] originally. Theadjustment unit 206 can transform the display color value parameter[R,G,B] to an adjusted display color value parameter [R′,G′,B′]according to formula (1), and the display device 208 displays the imageIMG according to the adjusted display color value parameter [R′,G′,B′],wherein formula (1) is expressed as follow:

$\begin{matrix}{{\begin{bmatrix}{X\; 1} & {X\; 2} & {X\; 3} \\{X\; 4} & {X\; 5} & {X\; 6} \\{X\; 7} & {X\; 8} & {X\; 9}\end{bmatrix} \times \begin{bmatrix}R \\G \\B\end{bmatrix}} = \begin{bmatrix}R^{\prime} \\G^{\prime} \\B^{\prime}\end{bmatrix}} & (1)\end{matrix}$

Wherein

$\quad\begin{bmatrix}{X\; 1} & {X\; 2} & {X\; 3} \\{X\; 4} & {X\; 5} & {X\; 6} \\{X\; 7} & {X\; 8} & {X\; 9}\end{bmatrix}$

is the color tone mapping matrix which is determined by the processingunit 204 according to the environmental information during capturing theimage IMG and the display characteristic information of the displaydevice 208; [R,G,B] is the display color value parameter which thedisplay device 208 originally refers to; [R′,G′,B′] is the adjusteddisplay color value parameter calculated by the adjustment unit 206.

More specifically, assuming the RGB value of the captured red image is(255, 0, 0). Since the color shift or other characteristic deviationoccurs in the display device 208, the display color value parameterabout the red image is (250, 5, 5). That is, without displaycalibration, the display device 208 will output the image which the RGBvalue is (250, 5, 5) according to the display color value parameter fordisplaying the captured red image. Therefore, the user will watch adistorted image. To solve this problem, according to Step 304, thepresent invention determines the corresponding display adjustingparameter (such as the color tone mapping matrix of formula (1))according to the environmental information during capturing the imageand the display characteristic information of the display device 208.Then, according to Step 306, the present invention calculates theadjusted display color value parameter according to formula (1) by theadjustment unit 206. For example, the adjusted display color valueparameter is (255, 0, 0). Therefore, when the display device 208displays the captured red image, the display device 208 will display thecorrect and undistorted image IMG according to the adjusted displaycolor value parameter.

Further, referring to FIG. 4, the electronic devices 20_1˜20_3 are amobile phone, a tablet computer and a notebook of the present inventionrespectively. Each electronic device respectively utilizes the displayadjustment method of the procedure 30 to obtain the correspondingadjusted display color value parameter and displays the same pictureimage according to the corresponding adjusted display color valueparameter. As shown in FIG. 4, the same picture image will have theconsistent color display effect when displaying on the different displaydevices.

In an embodiment, if the picture image is stored in JPEG file formatafter capturing, and the environmental brightness information and thecolor temperature information during capturing the picture image arealso stored in the header file of the picture image, when the electronicdevice 20 utilize the share scheme such as the community website, thecloud platform or else to transmit and obtain the picture image and thedisplay device 208 displays the picture image, the informationextraction unit 202 will read the header segment of the picture imagefile to obtain the environmental brightness information and the colortemperature information of the picture image. Next, the processing unit204 determines the display adjusting parameter according to theenvironmental information during capturing the image and the displaycharacteristic information of the display device 208 obtained by theinformation extraction unit 202. The adjustment unit 206 adjusts adisplay color value parameter of the display device 208 to generate anadjusted display color value parameter according to the displayadjusting parameter. Therefore, the display device 208 will display thecorrect and undistorted picture image according to the adjusted displaycolor value parameter.

In an embodiment, if the electronic device 20 further has an imageextraction device for capturing the image. When capturing the image, thedisplay device 208 can be utilized for displaying previewing frame (notpress the shutter key at this time). Meanwhile, the electronic device 20can utilize the algorithm of camera to evaluate the currentenvironmental color temperature and environmental brightnessimmediately, and provide the environmental color temperature informationand environmental brightness information to the processing unit 204 forcolor calibration of the display device 208. Next, after the aboveoperation of Step 304 and Step 306, the display device 208 will displaythe correct and undistorted picture image according to the adjusteddisplay color value parameter.

In conclusion, the present invention adjusts the display adjustingparameter of the display device according to the environmentalinformation during capturing the image and the display characteristicinformation of the display device, thus achieving the consistent displayeffect when showing the image indifferent display devices, and avoidingpicture image distortion during displaying. In other words, when theimage is displayed on different display devices, the present inventioncan provide color consistency of displaying the image and enforce theimage reproducibility to improve the image distortion problem caused bythe color shifted display device.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the invention. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A display adjustment method for a display devicecomprising: obtaining environmental information during capturing animage and display characteristic information of the display device;determining a display adjusting parameter according to the environmentalinformation during capturing the image and the display characteristicinformation of the display device; and controlling the display devicefor displaying the image according to the display adjusting parameter.2. The display adjustment method of claim 1, wherein the step ofdisplaying the image according to the display adjusting parametercomprises: adjusting a display color value parameter of the displaydevice to generate an adjusted display color value parameter accordingto the display adjusting parameter; and driving the display device fordisplaying the image according to the adjusted display color valueparameter.
 3. The display adjustment method of claim 1, wherein theenvironmental information during capturing the image comprises at leastone of environmental color temperature information and environmentalbrightness information during capturing.
 4. The display adjustmentmethod of claim 1, wherein the environmental information duringcapturing the image is stored in a header file of the image.
 5. Thedisplay adjustment method of claim 1, wherein the display characteristicinformation of the display device comprises at least one of colortemperature information and color space information of the displaydevice.
 6. An electronic device with display adjustment comprising: adisplay device; an information extraction unit for acquiringenvironmental information during capturing an image and displaycharacteristic information of the display device; a processing unit fordetermining a display adjusting parameter according to the environmentalinformation during capturing the image and the display characteristicinformation of the display device; and an adjustment unit forcontrolling the display device for displaying the image according to thedisplay adjusting parameter.
 7. The electronic device of claim 6,wherein the adjustment unit adjusts a display color value parameter ofthe display device to generate an adjusted display color value parameteraccording to the display adjusting parameter, and the adjustment unitdrives the display device for displaying the image according to theadjusted display color value parameter.
 8. The electronic device ofclaim 6, wherein the environmental information during capturing theimage comprises at least one of environmental color temperatureinformation and environmental brightness information during capturing.9. The electronic device of claim 6, wherein the environmentalinformation during capturing the image is stored in a header file of theimage.
 10. The electronic device of claim 6, wherein the displaycharacteristic information of the display device comprises at least oneof color temperature information and color space information of thedisplay device.